akash-ingress: make akash-node ingress hosts and configmap (port mapping) optional

[arno01]

We get akash-node-1 (as well as akash-node-[234]) configured by default even if we aren't using it, i.e. helm <install/upgrade> ... --set node="http://rpc.edgenet-1.ewr1.aksh.pw:26657"

helm-charts$ git grep akash-node-1 charts/akash-ingress
charts/akash-ingress/templates/configmap-tcp.yaml:  1317: "akash-services/akash-node-1:1317"
charts/akash-ingress/templates/configmap-tcp.yaml:  9090: "akash-services/akash-node-1:9090"
charts/akash-ingress/templates/configmap-tcp.yaml:  26656: "akash-services/akash-node-1:26656"
charts/akash-ingress/templates/configmap-tcp.yaml:  26657: "akash-services/akash-node-1:26657"
charts/akash-ingress/templates/ingress-node-api.yaml:                name: akash-node-1
charts/akash-ingress/templates/ingress-node-grpc.yaml:                name: akash-node-1
charts/akash-ingress/templates/ingress-node-p2p.yaml:                name: akash-node-1
charts/akash-ingress/templates/ingress-node-rpc.yaml:                name: akash-node-1

This leads to these errors:

root@vmi791458:~# kubectl -n akash-services describe ing | grep akash-node-1
                         /   akash-node-1:9090 (<error: endpoints "akash-node-1" not found>)
                        /   akash-node-1:1317 (<error: endpoints "akash-node-1" not found>)
                        /   akash-node-1:26656 (<error: endpoints "akash-node-1" not found>)
                        /   akash-node-1:26657 (<error: endpoints "akash-node-1" not found>)

root@vmi791458:~# kubectl -n ingress-nginx logs $(kubectl -n ingress-nginx get pods -l app.kubernetes.io/component=controller --output jsonpath='{.items[0].metadata.name}') --tail=150 | grep akash-node-1
...
...
W0310 21:24:25.556084       8 controller.go:359] Error getting Service "akash-services/akash-node-1": no object matching key "akash-services/akash-node-1" in local store
W0310 21:24:25.556112       8 controller.go:359] Error getting Service "akash-services/akash-node-1": no object matching key "akash-services/akash-node-1" in local store
W0310 21:24:25.556120       8 controller.go:359] Error getting Service "akash-services/akash-node-1": no object matching key "akash-services/akash-node-1" in local store
W0310 21:24:25.556139       8 controller.go:359] Error getting Service "akash-services/akash-node-1": no object matching key "akash-services/akash-node-1" in local store

[arno01]

I think these "errors" are harmless, so if changing this ^^ is complicated or increasing complexity, then we can probably pass on it.